Using Mode Matching Methods and Edge Diffraction in Horn Loudspeaker Simulation

Abstract

Amethod for simulating an expanding duct, likeahorn, by mode matching techniques is described. Forahorn in an infinite baffle, the modal radiation impedance and radiated pressure can be found from known relations. For ahorn equipped with asmall baffleorflange, however, diffraction from the edges has to be taken into account. This paper investigates howa ne dge diffraction term can be included, and its effect on the throat and radiation impedances and radiated pressure. Measurement results are presented, and are shown to be in good agreement with the simulations, both for ahorn in alarge baffle, and for ahorn with asmall flange.

The Boundary Element Method in Acoustics: A Survey

“…There are several references on a general review and evaluation of the methods [55,[150][151][152][153][154][155][156][157] and of software implementations [158][159][160]. The methods have been used in a range of applications: loudspeakers [38,50,51,[161][162][163][164][165][166][167][168][169][170][171][172][173][174][175][176][177][178], transducers [52,[179][180][181][182][183], hearing aid [184], diffusers [185,186], sound within or around the human body [159,[187][188][189][190], scattering by blood cells [191], e...…”